Domino Effect
Throw a weapon at an enemy so that his weapon hits another |
Another achievement that's worth attempting in the laid-back prelude level (The Metro), this one tasks you with throwing a weapon at an enemy, then having the enemy's weapon hit one of their allies.
There's no exact science to this - knocking a weapon out of an enemy's hand will usually make it fly in a random direction - but getting two enemies to chase you and throwing your weapon to knock them out when they're practically overlapping each other is a reliable strategy.